Method for evaluating vibration transmission characteristics of automobile pedal

Abstract

The application provides a kind of automobile pedal vibration transmission characteristic evaluation method, comprising the following steps: S1, build test tooling;S2, install the pedal on the test tooling;S3, fix the test tooling;S4, apply excitation at the pedal mounting point, test the vibration acceleration at the mounting point of the pedal and the operating surface of the pedal;S5, data analysis, obtain evaluation results.The automobile pedal vibration transmission characteristic evaluation method makes the vibration evaluation of the pedal system no longer depend on the whole vehicle, and provides support for the vibration attenuation evaluation of the pedal body in the system stage.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile pedal, and particularly relates to a method for evaluating vibration transmission characteristics of an automobile pedal. BACKGROUND

[0002] An automobile pedal (including an accelerator pedal and a brake pedal) is an essential accessory for automobile driving, directly contacts with a driver's body, and the vibration of the pedal directly affects the experience of the driver, and is an important factor of comfort. At present, the vibration evaluation of the pedal can only be based on the problem of a physical sample vehicle, and a large number of man-hours and manpower are consumed to solve the problem, and the vibration attenuation characteristics cannot be evaluated based on a brake pedal system alone in a digital sample vehicle stage (without a physical vehicle body, only a pedal piece). SUMMARY

[0003] The present application aims to solve at least one of the technical problems in the prior art. To this end, the present application provides a method for evaluating vibration transmission characteristics of an automobile pedal, and the purpose is to make the vibration evaluation of the pedal system no longer depend on the whole vehicle, and the vibration attenuation of the pedal body can be evaluated in the single piece stage.

[0004] In order to solve the above technical problems, the technical scheme adopted by the present application is: a method for evaluating vibration transmission characteristics of an automobile pedal, comprising the steps of:

[0005] S1, building a test tool;

[0006] S2, installing the pedal on the test tool;

[0007] S3, fixing the test tool;

[0008] S4, applying an excitation at the pedal mounting point, and testing the vibration acceleration at the mounting point and the operating surface of the pedal;

[0009] S5, data analysis, and obtaining evaluation results.

[0010] The test tool comprises a support frame and a mounting plate assembly arranged on the support frame, and in the step S2, the pedal is installed on the mounting plate assembly.

[0011] The angle of the mounting plate assembly is adjustable.

[0012] The mounting plate assembly comprises a panel frame and a mounting panel body arranged on the panel frame, and the panel frame is connected with the support frame, and in the step S2, the pedal is installed on the mounting panel body.

[0013] The support frame comprises a panel clamp and a locking bolt for mounting the mounting plate assembly on the panel clamp, and the panel clamp is provided with an adjusting groove through which the locking bolt passes, and the adjusting groove is a circular arc groove.

[0014] The adjusting grooves are two and symmetrically arranged, and one adjusting bolt is inserted into each adjusting groove, and the mounting plate assembly is connected with the adjusting bolt.

[0015] The support frame further comprises a side support, and the panel clamp is arranged on the side support.

[0016] In the step S4, an excitation is applied at the mounting point, the excitation direction is perpendicular to the direction of the pedal mounting surface, and a sine sweep excitation is used.

[0017] In the step S4, when the sine sweep excitation is used, the amplitude is set to 1N.

[0018] The automobile pedal vibration transmission characteristic evaluation method of the present application makes the vibration evaluation of the pedal system no longer dependent on the whole vehicle, and can support the vibration attenuation evaluation of the pedal body in the system stage. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of a test tool;

[0020] Figure 2 is a panel mounting schematic diagram;

[0021] The marks in the above figures are as follows: 1, side support; 2, panel frame; 3, mounting panel body; 4, panel clamp; 5, fixing bolt; 6, locking bolt; 7, adjusting groove; 8, pedal mounting point. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which several embodiments of the present application are given, but the present application can be realized in different forms and is not limited to the embodiments described herein, on the contrary, these embodiments are provided to make the disclosed content of the present application more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or there can be intervening elements, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be intervening elements, the terms "vertical", "horizontal", "up", "down", and similar expressions used herein are for purposes of illustration only.

[0024] It should be noted that in the following embodiments, the "first", "second", and "third" do not represent an absolute division of structure and / or function, nor do they represent the execution order, but are merely for the convenience of description.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "including", "comprising", "having" and the like are specifically intended to be construed in an inclusive sense and not to the exclusion of any other items that can be useful in connection with the specific embodiments described.

[0026] The application provides a method for evaluating the vibration transmission characteristics of an automobile pedal, comprising the following steps:

[0027] S1, building a test tool;

[0028] S2, installing the pedal on the test tool;

[0029] S3, fixing the test tool;

[0030] S4, applying an excitation at the pedal mounting point 8, testing the vibration acceleration at the mounting point of the pedal and the operating surface of the pedal;

[0031] S5, data analysis, obtaining the evaluation results.

[0032] Specifically, the method for evaluating the vibration transmission characteristics of an automobile pedal provides an angle-adjustable installation boundary for the automobile pedal, and combines the designed test and analysis method, so that the vibration evaluation of the pedal system no longer depends on the whole vehicle, and the vibration attenuation of the pedal body can be evaluated in the single piece stage.

[0033] As shown in Figure 1 and Figure 2 , the test tool comprises a support frame and an installation plate assembly arranged on the support frame, and the pedal is installed on the installation plate assembly in step S2. The angle of the installation plate assembly is adjustable, and the installation plate assembly is rotatably arranged on the support frame, the center line of rotation of the installation plate assembly is parallel to the first direction, and the first direction is a horizontal direction. The test tool simulates the real vehicle installation environment of the automobile pedal, and the installation plate assembly is arranged to be angle-adjustable, and the installation plate assembly can drive the automobile pedal to rotate synchronously when the installation plate assembly rotates, thereby realizing the corresponding adjustment of the installation angle of the automobile pedal. By establishing the installation angle-adjustable tool, the maximum and minimum installation angles of the pedal under the real vehicle boundary can be covered, so that the test requirements can be better met, and the universality is improved.

[0034] As shown in Figure 1 and Figure 2As shown in the figure, the mounting plate assembly comprises a panel frame 2 and a mounting panel body 3 arranged on the panel frame 2, the panel frame 2 is connected with the support frame, and the pedal is mounted on the mounting panel body 3 in step S2. The mounting panel body 3 is a rectangular flat plate, the length direction of the mounting panel body 3 is parallel to the first direction, the mounting panel body 3 is fixedly connected with the panel frame 2, and the panel frame 2 surrounds the four sides of the mounting panel body 3. The angle of the mounting plate assembly refers to the included angle between the width direction of the mounting panel body 3 and the vertical direction, and the width direction of the mounting panel body 3 is perpendicular to the length direction thereof.

[0035] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the support frame comprises a panel clamp 4 and a locking bolt 6 for mounting the mounting plate assembly on the panel clamp 4, the panel clamp 4 is provided with an adjusting groove 7 for the locking bolt 6 to pass through, and the adjusting groove 7 is a circular arc groove. The axis of the adjusting groove 7 is parallel to the first direction, the panel clamp 4 is vertically arranged, two panel clamps 4 are arranged on the same line parallel to the first direction, the two panel clamps 4 are matched to clamp the panel frame 2, and the panel frame 2 is located between the two panel clamps 4. The panel frame 2 is provided with an internal threaded hole for the locking bolt 6 to insert, the locking bolt 6 is inserted into the internal threaded hole on the panel frame 2 after passing through the adjusting groove 7, and the panel frame 2 is fixed on the panel clamp 4 after the locking bolt 6 is tightened, so that the angle of the mounting plate assembly remains fixed. The axis of the locking bolt 6 is parallel to the first direction, the cooperation of the locking bolt 6 and the panel clamp 4 is adopted to realize the fixation of the mounting plate assembly and the adjustment of the angle of the mounting plate assembly, which is convenient and simple to operate and fixed firmly.

[0036] As shown in the figure, Figure 2 On the panel clamp 4, two adjusting grooves 7 are symmetrically arranged on the panel clamp 4, one adjusting bolt is respectively inserted into each adjusting groove 7, the two ends of the mounting plate assembly are respectively connected with the two adjusting bolts, the two adjusting grooves 7 on the panel clamp 4 are coaxially arranged, the axis of the adjusting groove 7 is also the rotation center line of the mounting plate assembly, and the arc of the adjusting groove 7 is less than 90 degrees.

[0037] As shown in the figure, Figure 1 and Figure 2 As shown in the figure, the support frame further comprises side supports 1, two side supports 1 are arranged on the same line parallel to the first direction, each panel clamp 4 is arranged on one side support 1, and the two panel clamps 4 are located between the two side supports 1. As preferred, the panel clamp 4 is fixedly mounted on the side support 1 by a plurality of fixing bolts 5.

[0038] As preferred, the thickness of the mounting panel body 3 is 3.0mm. The automobile pedal is mounted on the mounting panel body 3 by bolts, and the mounting panel body 3 is provided with mounting holes for the bolts to pass through.

[0039] As preferred, the material of the side support 1 is aluminum alloy profile, which is light in weight, high in mode, and flexible in assembly.

[0040] In the above step S2, the automobile pedal is mounted on the test tooling, and the torque of the locking bolt 6 is applied to meet the design requirements, so as to fix the angle of the mounting plate assembly, that is, to fix the mounting position and angle of the automobile pedal.

[0041] In the above step S3, the side support 1 is rigidly connected with the iron floor by bolts to realize the fixation of the test tooling, and the iron floor provides a simulated rigid infinite boundary.

[0042] In the above step S4, an excitation is applied at the mounting point, the frequency is 5-20Hz, the excitation direction is perpendicular to the mounting panel body 3 (the excitation direction is perpendicular to the length direction and width direction of the mounting panel body 3, and the length direction of the mounting panel body 3 is perpendicular to the width direction thereof), a sinusoidal sweep excitation is used, and the vibration acceleration at the excitation point and the operating surface of the pedal is picked up.

[0043] As preferred, in the above step S4, when the sinusoidal sweep excitation is used, the amplitude is set to 1N (unit force) and other required force levels.

[0044] As preferred, in the above step S4, the vibration acceleration data at the automobile pedal mounting point 8 is detected by a first acceleration sensor, and the vibration acceleration data at the operating surface of the automobile pedal is detected by a second acceleration sensor, the first acceleration sensor is located at the automobile pedal provided on the mounting panel body 3, and the second acceleration sensor is located at the operating surface of the automobile pedal, the operating surface is the surface of the part for stepping on the automobile pedal, and the operating surface is located at one end of the automobile pedal, and the other end of the automobile pedal is mounted on the mounting panel body 3.

[0045] In the above step S5, the data detected by the first acceleration sensor and the second acceleration sensor are analyzed to obtain the attenuation amount of the automobile pedal and the frequency band to be optimized. The analysis results include the following contents:

[0046] (1) Obtain the response curve of the automobile pedal and its mounting surface under unit force.

[0047] (2) the vibration acceleration curves of the active side (the part on the automobile pedal installed on the mounting panel body 3) and the passive side (the part on the automobile pedal where the operation surface is located) under each excitation are compared respectively, and the vibration amplitude difference of the two at the corresponding frequency is the vibration isolation amount of the automobile pedal at the frequency. The attenuation target value can be set autonomously to constrain the pedal vibration transmission characteristics, so as to identify the frequency band with insufficient attenuation.

[0048] The application is described above in conjunction with the drawings, and it is obvious that the specific implementation of the application is not limited by the above manner, as long as various non-essential improvements are made by adopting the method concept and technical solution of the application, or the concept and technical solution of the application is directly applied to other occasions without improvement, which is within the protection scope of the application.

Claims

1. A method for evaluating a vibration transmission characteristic of an automobile pedal, characterized by, The method comprises the steps of: S1, building a test tool; S2, installing the pedal on the test tool; S3, fixing the test tool; S4, applying an excitation at the pedal mounting point to test the vibration acceleration at the mounting point and the operating surface of the pedal; S5, data analysis to obtain evaluation results; The test tool comprises a support frame and an installation plate assembly arranged on the support frame, and the pedal is installed on the installation plate assembly in step S2; the angle of the installation plate assembly is adjustable, the installation plate assembly is rotatably arranged on the support frame, the center line of rotation of the installation plate assembly is parallel to the first direction, and the first direction is a horizontal direction; The test tool simulates the real vehicle installation environment of the automobile pedal, and the installation plate assembly is arranged to be adjustable in angle, so that the automobile pedal is synchronously rotated when the installation plate assembly is rotated, thereby realizing the corresponding adjustment of the installation angle of the automobile pedal; The installation plate assembly comprises a panel frame and an installation panel body arranged on the panel frame, the panel frame is connected with the support frame, and the pedal is installed on the installation panel body in step S2; the length direction of the installation panel body is parallel to the first direction, the installation panel body is fixedly connected with the panel frame, the panel frame surrounds the four sides of the installation panel body; the angle of the installation plate assembly refers to the included angle between the width direction of the installation panel body and the vertical direction, and the width direction of the installation panel body is perpendicular to the length direction thereof; The support frame comprises a panel clamp and a locking bolt for mounting the installation plate assembly on the panel clamp, the panel clamp is provided with an adjusting groove through which the locking bolt passes, and the adjusting groove is a circular arc groove; the axis of the adjusting groove is parallel to the first direction, the panel clamp is vertically arranged, two panel clamps are arranged on the same straight line parallel to the first direction, the two panel clamps are matched to clamp the panel frame, and the panel frame is located between the two panel clamps; an internal thread hole is arranged on the panel frame for the locking bolt to insert, the locking bolt is inserted into the internal thread hole on the panel frame after passing through the adjusting groove, the panel frame is fixed on the panel clamp after the locking bolt is tightened, so that the angle of the installation plate assembly is kept fixed; the axis of the locking bolt is parallel to the first direction, the locking bolt and the panel clamp are matched to realize the fixation and angle adjustment of the installation plate assembly, and the operation is convenient and simple and firm; On the panel clamp, two adjusting grooves are symmetrically arranged on the panel clamp, one adjusting bolt is respectively inserted into each adjusting groove, the two ends of the installation plate assembly are respectively connected with the two adjusting bolts, the two adjusting grooves on the panel clamp are coaxially arranged, and the axis of the adjusting groove is also the center line of rotation of the installation plate assembly, and the arc of the adjusting groove is less than 90 degrees.

2. The method of evaluating the vibration transmission characteristics of an automobile pedal according to claim 1, characterized by The installation panel body is a rectangular flat plate.

3. The method of claim 1, wherein The support frame further comprises a side support, and the panel clamp is arranged on the side support.

4. The method of evaluating the vibration transmission characteristics of an automobile pedal according to any one of claims 1 to 3, characterized by In step S4, the excitation is applied at the mounting point in a direction perpendicular to the pedal mounting surface, and a sine sweep excitation is used.

5. The method of evaluating the vibration transmission characteristics of an automobile pedal according to claim 4, characterized by In step S4, when the sine sweep excitation is used, the amplitude is set to 1 N.

Images